US6113145A - Safety belt pretensioner - Google Patents

Safety belt pretensioner Download PDF

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Publication number
US6113145A
US6113145A US09/011,442 US1144298A US6113145A US 6113145 A US6113145 A US 6113145A US 1144298 A US1144298 A US 1144298A US 6113145 A US6113145 A US 6113145A
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US
United States
Prior art keywords
piston
cylinder
teeth
pretensioner according
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/011,442
Inventor
Raymond George Evans
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Joyson Safety Systems Inc
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Breed Automotive Technology Inc
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Publication date
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Assigned to BREED AUTOMOTIVE TECHNOLOGY, INC. reassignment BREED AUTOMOTIVE TECHNOLOGY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EVANS, RAYMOND GEORGE
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Publication of US6113145A publication Critical patent/US6113145A/en
Assigned to CONGRESS FINANCIAL CORPORATION (FLORIDA) reassignment CONGRESS FINANCIAL CORPORATION (FLORIDA) SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BREED AUTOMOTIVE TECHNOLOGY, INC.
Assigned to BREED AUTOMOTIVE TECHNOLOGY, INC. reassignment BREED AUTOMOTIVE TECHNOLOGY, INC. RELEASE OF SECURITY INTEREST IN TRADEMARKS Assignors: CONGRESS FINANCIAL CORPORATION
Assigned to KEY SAFETY SYSTEMS, INC. reassignment KEY SAFETY SYSTEMS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BREED AUTOMOTIVE TECHNOLOGY, INC.
Assigned to CITICORP USA, INC. reassignment CITICORP USA, INC. SECURITY AGREEMENT Assignors: AEGIS KEY CORP, BREED AUTOMOTIVE TECHNOLOGY, INC, HAMLIN ELECTRONICS LIMITED PARTNERSHIP, HAMLIN INCORPORATED, KEY ASIAN HOLDINGS, INC, KEY AUTOMOTIVE ACCESSORIES, INC, KEY AUTOMOTIVE OF FLORIDA, INC, KEY AUTOMOTIVE WEST, INC, KEY AUTOMOTIVE, LP, KEY CAYMAN GP LLC, KEY ELECTRONICS OF NEVADA, INC, KEY INTERNATIONAL MANUFACTURING DEVELOPMENT CORPORATION, KEY SAFETY RESTRAINT SYSTEMS, INC, KEY SAFETY SYSTEMS FOREIGN HOLDCO, LLC, KEY SAFETY SYSTEMS OF TEXAS, INC, KEY SAFETY SYSTEMS, INC, KSS ACQUISITION COMPANY, KSS HOLDINGS, INC
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
    • B60R22/1952—Transmission of tensioning power by cable; Return motion locking means therefor

Definitions

  • the present invention relates to pretensioners for vehicle safety restraint devices and particularly to a locking and sealing means therefor.
  • Pretensioners reduce the slack in a belt restraint system by rapidly drawing in a length of belt webbing in the first milliseconds of a crash situation, to secure the vehicle occupant in the correct position in the seat and reduce the residual forward momentum of the occupant traditionally resulting from slack in the belt webbing due to relatively loose winding on the retractor, to bulky clothing and/or to belt webbing stretch.
  • One example of a known pretensioner uses pyrotechnic means to generate gas to move a piston attached to a cable to tighten the belt by rapidly rewinding the retractor or by pulling back the buckle attachment.
  • the present invention provides an improved pretensioner.
  • a pyrotechnic pretensioner for a vehicle safety restrain comprising:
  • the internal surface of the cylinder has a tooth profile cooperating with the piston locking means and the piston has a circumferential radially extending resilient sealing member for cooperating with the tooth profile to seal the spaces between teeth.
  • the piston has two radially extending sealing members, e.g. sealing rings such as O-rings, spaced apart by an odd integral number of half pitches of the cylinder teeth.
  • sealing members e.g. sealing rings such as O-rings
  • the piston is die cast directly onto the cable, e.g. by a pressure die casting process.
  • the cylinder teeth are preferably of saw tooth profile but may be semi-circular in profile.
  • the farce reservoir is preferably a pyrotechnic gas generator.
  • a pretensioner can be constructed with a sealing arrangement according to the present invention which has many advantages over known devices.
  • FIG. 1 is a cross-sectional view of a pyrotechnic buckle pretensioner constructed in accordance with the invention.
  • FIG. 2 is a large scale view of part of FIG. 1.
  • FIG. 3 is a partial view of the pretensioner showing an alternate embodiment.
  • FIG. 1 a safety restraint belt buckle 1 is shown at the end of a cable 3 with plastic coating 2.
  • the cable 3, is rivetted at 4 to the buckle housing 1 and passes round a mounting bracket 6 and through a seal 5 into a pretensioner tube 8 where it is die cast to a pretensioner piston 7.
  • the mounting bracket 6 may be a pulley or a simple channel.
  • a gas generator housing 9 is attached to the side of the pretensioner tube 8 with which it communicates to enable gas to push the piston along the tube in the direction of arrow A.
  • the gas generator is activated by an associated electrical pulse generating means 9a.
  • the inside of the tube 8 has a sawtooth form and the piston 7 is associated with an elliptical locking device 10 which moves freely in the pretensioning phase, in the direction of arrow A, since the edges of the elliptical device 10 ride over the long sides of the saw teeth.
  • the edges of the elliptical device engage in the teeth in the tube and lock the piston against the reverse movement, i.e. in the direction reverse to arrow A.
  • the piston 7 has two axially spaced, radially extending ⁇ O ⁇ ring seals 11 and 12. These seals are resilient, made of plastics material or rubber or other suitable gas impermeable resilient material. They are spaced apart by an odd number of 1/2 tooth spacings so that at any position in the tube when one seal sits in the space between the teeth, the other seal sits on or close to the crest of the tooth thus providing an effective seal for every position of the piston.
  • an electrical pulse activates the gas generator which rapidly releases a volume of gas through a vertical vent in the gas generator housing into the tube between the tube seal 5 and the ⁇ O ⁇ ring 11.
  • the pressure of this gas forces the piston along the tube thus retracting the cable and pulling the buckle head down away from the vehicle occupant until the force in the seat belt system, i.e. the load provided by the occupant, equals the retracting force or until full retraction of the buckle head is complete.
  • the load in the system acts to pull the piston back along the tube.
  • the elliptical locking device engages with the saw tooth ribs inside the pressure tube and thus the cable, buckle and restraint system is securely held in the pre-tensioned position.
  • the teeth profile inside the pressure tube need not be a saw tooth profile for the sealing means of this invention to work: a tooth profile of equilateral triangles or even of rounded teeth 8a (see FIG. 3) would be equally effective provided that the pitch of the ⁇ O ⁇ rings is 1/2 a pitch greater than the pitch of the teeth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Confectionery (AREA)

Abstract

A pyrotechnic pretensioner for a vehicle safety belt comprises a piston slidably movable within a cylinder and attached to one end of a cable. The piston is driven along the cylinder by a gas generator to pull the cable and tension the safety belt. A locking device allows free movement of the piston in a tensioning direction and engages the cylinder to prevents movement of the piston in a loosening direction. The internal surface of the cylinder has a tooth profile engaged by the locking device. The piston has two resilient sealing members which cooperate with the tooth profile to seal the spaces between the teeth. The two sealing members are spaced apart by an odd integral number of half pitches of the teeth.

Description

FIELD OF THE INVENTION
The present invention relates to pretensioners for vehicle safety restraint devices and particularly to a locking and sealing means therefor.
BACKGROUND OF THE INVENTION
Pretensioners reduce the slack in a belt restraint system by rapidly drawing in a length of belt webbing in the first milliseconds of a crash situation, to secure the vehicle occupant in the correct position in the seat and reduce the residual forward momentum of the occupant traditionally resulting from slack in the belt webbing due to relatively loose winding on the retractor, to bulky clothing and/or to belt webbing stretch.
One example of a known pretensioner uses pyrotechnic means to generate gas to move a piston attached to a cable to tighten the belt by rapidly rewinding the retractor or by pulling back the buckle attachment.
There is a problem with such a pyrotechnic pretensioner in sealing the space between the moving piston and the walls of the cylinder within which it moves, against the large force of the gas generated. Known sealing systems are bulky and difficult to assemble accurately with attendant higher costs of manufacture.
The present invention provides an improved pretensioner.
SUMMARY OF THE INVENTION
According to the present invention there is provided a pyrotechnic pretensioner for a vehicle safety restrain comprising:
means for tensioning belt webbing;
a cable for actuating the tensioning means;
a piston slidably movable within a cylinder and attached to one end of the cable;
a reservoir of force for driving the piston along the cylinder to pull the cable and tension the webbing;
and a locking means which allows free movement of the piston in the cylinder in a webbing tensioning direction and operates to engage the piston with the cylinder in response to movement of the cable in a webbing loosening direction,
wherein
the internal surface of the cylinder has a tooth profile cooperating with the piston locking means and the piston has a circumferential radially extending resilient sealing member for cooperating with the tooth profile to seal the spaces between teeth.
Preferably the piston has two radially extending sealing members, e.g. sealing rings such as O-rings, spaced apart by an odd integral number of half pitches of the cylinder teeth.
According to a preferred embodiment the piston is die cast directly onto the cable, e.g. by a pressure die casting process.
The cylinder teeth are preferably of saw tooth profile but may be semi-circular in profile. The farce reservoir is preferably a pyrotechnic gas generator.
It will thus be seen that a pretensioner can be constructed with a sealing arrangement according to the present invention which has many advantages over known devices.
For a better understanding of the present invention and to snow row the same may be carried into effect, reference will now be made to the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a cross-sectional view of a pyrotechnic buckle pretensioner constructed in accordance with the invention.
FIG. 2 is a large scale view of part of FIG. 1.
FIG. 3 is a partial view of the pretensioner showing an alternate embodiment.
DETAILED DESCRIPTION OF DRAWINGS
In FIG. 1 a safety restraint belt buckle 1 is shown at the end of a cable 3 with plastic coating 2. The cable 3, is rivetted at 4 to the buckle housing 1 and passes round a mounting bracket 6 and through a seal 5 into a pretensioner tube 8 where it is die cast to a pretensioner piston 7.
The mounting bracket 6 may be a pulley or a simple channel.
A gas generator housing 9 is attached to the side of the pretensioner tube 8 with which it communicates to enable gas to push the piston along the tube in the direction of arrow A. The gas generator is activated by an associated electrical pulse generating means 9a.
The inside of the tube 8 has a sawtooth form and the piston 7 is associated with an elliptical locking device 10 which moves freely in the pretensioning phase, in the direction of arrow A, since the edges of the elliptical device 10 ride over the long sides of the saw teeth. However, once the pretensioning operation is complete and the vehicle occupant momentum puts force on the buckle and thus on the piston in the opposite direction, then the edges of the elliptical device engage in the teeth in the tube and lock the piston against the reverse movement, i.e. in the direction reverse to arrow A.
The piston 7 has two axially spaced, radially extending `O` ring seals 11 and 12. These seals are resilient, made of plastics material or rubber or other suitable gas impermeable resilient material. They are spaced apart by an odd number of 1/2 tooth spacings so that at any position in the tube when one seal sits in the space between the teeth, the other seal sits on or close to the crest of the tooth thus providing an effective seal for every position of the piston.
In operation, when a crash is sensed, an electrical pulse activates the gas generator which rapidly releases a volume of gas through a vertical vent in the gas generator housing into the tube between the tube seal 5 and the `O` ring 11. The pressure of this gas forces the piston along the tube thus retracting the cable and pulling the buckle head down away from the vehicle occupant until the force in the seat belt system, i.e. the load provided by the occupant, equals the retracting force or until full retraction of the buckle head is complete.
At this stage, the load in the system acts to pull the piston back along the tube. However the elliptical locking device engages with the saw tooth ribs inside the pressure tube and thus the cable, buckle and restraint system is securely held in the pre-tensioned position.
It will be seen that because the two `O` ring seals are separated by a distance which is 1/2 a pitch offset from the pitch of the saw tooth ribs, then at any instant at least one of the `O` rings is in sealing arrangement with a saw tooth rib. Thus a strong, secure seal is provided which can withstand the high pressures generated yet it is relatively easy to install.
The teeth profile inside the pressure tube need not be a saw tooth profile for the sealing means of this invention to work: a tooth profile of equilateral triangles or even of rounded teeth 8a (see FIG. 3) would be equally effective provided that the pitch of the `O` rings is 1/2 a pitch greater than the pitch of the teeth.

Claims (10)

What is claimed is:
1. A pyrotechnic pretensioner for a vehicle safety restraint comprising:
engaging means for engaging a belt webbing;
a cable attached to the engaging means;
a piston slidably movable within a cylinder and attached to one end of the cable;
driving means for driving the piston along the cylinder to pull the cable and tension the webbing; and
locking means which allows free movement of the piston in the cylinder in a webbing tensioning direction and operates to engage the piston with the cylinder in response to movement of the cable in a webbing loosening direction,
wherein the internal surface of the cylinder has a tooth profile cooperating with the locking means and the piston has two circumferential radially extending resilient sealing members for cooperating with the tooth profile to seal the spaces between teeth, wherein the two radially extending sealing members are spaced apart by an odd integral number of half pitches of the teeth.
2. A pretensioner according to claim 1 wherein at least one sealing member comprises a resilient sealing ring.
3. A pretensioner according to claim 1, wherein the piston is a die cast part.
4. A pretensioner according to claim 2 wherein the piston is a pressure die cast part.
5. A pretensioner according to claim 1 wherein at least one sealing member comprises an O-ring seal.
6. A pretensioner according to claim 1 wherein the internal cylinder teeth are of saw tooth profile.
7. A pretensioner according to claim 1 wherein the driving means is a gas generator.
8. A pretensioner according to claim 7 wherein the gas generator is activated in a crash situation by a signal input thereto.
9. A pretensioner according to claim 1 wherein the internal cylinder teeth are rounded.
10. A pretensioner according to claim 9 wherein the internal cylinder teeth are of semi-circular profile.
US09/011,442 1995-08-11 1996-08-09 Safety belt pretensioner Expired - Fee Related US6113145A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9516540.3A GB9516540D0 (en) 1995-08-11 1995-08-11 Pretensioner
GB9516540 1995-08-11
PCT/GB1996/001963 WO1997006995A1 (en) 1995-08-11 1996-08-09 Pretensioner

Publications (1)

Publication Number Publication Date
US6113145A true US6113145A (en) 2000-09-05

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US09/011,442 Expired - Fee Related US6113145A (en) 1995-08-11 1996-08-09 Safety belt pretensioner

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US (1) US6113145A (en)
EP (1) EP0842069B1 (en)
JP (1) JPH11512045A (en)
DE (1) DE69613127T2 (en)
ES (1) ES2158337T3 (en)
GB (2) GB9516540D0 (en)
WO (1) WO1997006995A1 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6264281B1 (en) * 1999-08-25 2001-07-24 Daimlerchrysler Corporation Seat belt buckle pretensioner mounting mechanism
US6513880B2 (en) * 1999-03-15 2003-02-04 Nhk Spring Co., Ltd. Power actuator suitable for vehicle occupant restraint systems
US20030030263A1 (en) * 2001-08-10 2003-02-13 Takata Corporation Pretensioner
US6572147B2 (en) 2000-03-31 2003-06-03 Delphi Technologies, Inc. Seat restraint tensioner
US6604599B2 (en) 1999-03-15 2003-08-12 Nhk Spring Co., Ltd. Anti-submarine vehicle occupant restraint system
US6837540B2 (en) 2000-10-13 2005-01-04 Nhk Spring Co., Ltd. Anti-submarine vehicle occupant restraint system
US20050017495A1 (en) * 2003-07-25 2005-01-27 Breed Automotive Technology, Inc. Wire, wire rope or cable assemblies and devices using same
US20050206153A1 (en) * 2004-03-22 2005-09-22 John Bell Seat belt pretensioner
US20050275210A1 (en) * 2004-06-11 2005-12-15 Key Safety Systems, Inc. Seat belt pretensioner
US20060017276A1 (en) * 2004-06-24 2006-01-26 John Bell Seat belt pretensioner
US20060038391A1 (en) * 2004-06-24 2006-02-23 John Bell Seat belt pretensioner
US20060076765A1 (en) * 2004-06-24 2006-04-13 John Bell Seat belt pretensioner
US20070013186A1 (en) * 2005-07-12 2007-01-18 Key Safety Systems, Inc. Seat belt pretensioner
US20070278779A1 (en) * 2006-05-31 2007-12-06 Key Safety Systems, Inc. Seat Belt Pretensioner Using Preformed Tubes
US7820014B2 (en) 2004-04-22 2010-10-26 Lah Ruben F Systems and methods for remotely determining and changing cutting modes during decoking
US20110198910A1 (en) * 2007-02-15 2011-08-18 Ts Tech., Ltd. Seatbelt pretensioner mechanism for vehicle seat
US8550499B2 (en) 2010-12-09 2013-10-08 Autoliv Asp, Inc. Pyrotechnic lap belt pretensioner with slider bar function
US10000181B2 (en) * 2016-10-13 2018-06-19 Hyundai Motor Company Pretensioner and safety belt assembly including the same
CN113103984A (en) * 2020-01-10 2021-07-13 均胜安全系统德国有限公司 Tensioning drive for a safety belt device and device having a tensioning drive
US20210253059A1 (en) * 2020-02-14 2021-08-19 Joyson Safety Systems Acquisition Llc Seat belt pretensioner system
US11390244B2 (en) * 2019-12-10 2022-07-19 GM Global Technology Operations LLC Cam based seat belt pretensioner

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0827882B1 (en) * 1996-08-08 2003-01-02 Breed Automotive Technology, Inc. Pretensioner for vehicle safety restraint
FR2758503B1 (en) * 1997-01-23 1999-03-26 Faure Bertrand Equipements Sa MOTOR VEHICLE SEAT INCLUDING A SEAT BELT PRETENSIONER
DE29819095U1 (en) * 1998-10-27 2000-04-27 Dittrich, Klaus-Jürgen, 28832 Achim Belt tensioners
DE29822622U1 (en) 1998-12-18 1999-02-18 E. Dittrich KG "Schlüssel"-Erzeugnisse, 28307 Bremen Belt tensioners
JP3519302B2 (en) * 1999-02-09 2004-04-12 株式会社東海理化電機製作所 Pretensioner for webbing take-up device
EP1737711B1 (en) * 2004-04-22 2009-12-23 Autoliv Development Ab Rope tightener comprising a double rope feed
JP5710297B2 (en) * 2011-02-01 2015-04-30 芦森工業株式会社 Pretensioner device and seat belt device
JP2023007520A (en) * 2019-12-20 2023-01-19 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社 Pretensioner and seat belt device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2258063A1 (en) * 1972-11-27 1974-06-20 Opel Adam Ag HOLLOW COMPONENT, IN PARTICULAR FOR VEHICLES
US4508287A (en) * 1982-04-29 1985-04-02 Bayern-Chemie Gesellschaft Fur Flugchemische Antriebe Mit Beschrankter Haftung Winding attachment for safety belts in vehicles
JPH06344863A (en) * 1993-06-03 1994-12-20 Tokai Rika Co Ltd Pretensioner
US5480190A (en) * 1992-02-27 1996-01-02 Trw Repa Gmbh Energy converter in a restraining system for vehicle occupants

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286758A (en) * 1980-01-29 1981-09-01 Toyota Jidosha Kogyo Kabushiki Kaisha Webbing retractor
JPH0724295Y2 (en) * 1988-09-29 1995-06-05 本田技研工業株式会社 Piston structure of seat belt preloader device
DE4206093C1 (en) * 1992-02-27 1993-07-15 Trw Repa Gmbh, 7077 Alfdorf, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2258063A1 (en) * 1972-11-27 1974-06-20 Opel Adam Ag HOLLOW COMPONENT, IN PARTICULAR FOR VEHICLES
US4508287A (en) * 1982-04-29 1985-04-02 Bayern-Chemie Gesellschaft Fur Flugchemische Antriebe Mit Beschrankter Haftung Winding attachment for safety belts in vehicles
US5480190A (en) * 1992-02-27 1996-01-02 Trw Repa Gmbh Energy converter in a restraining system for vehicle occupants
JPH06344863A (en) * 1993-06-03 1994-12-20 Tokai Rika Co Ltd Pretensioner

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6913319B2 (en) * 1999-03-15 2005-07-05 Nhk Spring Co., Ltd. Power actuator
US6604599B2 (en) 1999-03-15 2003-08-12 Nhk Spring Co., Ltd. Anti-submarine vehicle occupant restraint system
US6513880B2 (en) * 1999-03-15 2003-02-04 Nhk Spring Co., Ltd. Power actuator suitable for vehicle occupant restraint systems
US20030227213A1 (en) * 1999-03-15 2003-12-11 Nhk Spring Co., Ltd. Power actuator
US6264281B1 (en) * 1999-08-25 2001-07-24 Daimlerchrysler Corporation Seat belt buckle pretensioner mounting mechanism
US6572147B2 (en) 2000-03-31 2003-06-03 Delphi Technologies, Inc. Seat restraint tensioner
US6837540B2 (en) 2000-10-13 2005-01-04 Nhk Spring Co., Ltd. Anti-submarine vehicle occupant restraint system
US7172218B2 (en) * 2001-08-10 2007-02-06 Takata Corporation Pretensioner
US20030030263A1 (en) * 2001-08-10 2003-02-13 Takata Corporation Pretensioner
US20060279077A1 (en) * 2001-08-10 2006-12-14 Takata Corporation Retractable seatbelt apparatus
US20050017495A1 (en) * 2003-07-25 2005-01-27 Breed Automotive Technology, Inc. Wire, wire rope or cable assemblies and devices using same
WO2005016691A3 (en) * 2003-07-25 2005-09-15 Key Safety Systems Inc Seat belt pretensioner with energy dissipating wire cable
US7398998B2 (en) * 2003-07-25 2008-07-15 Key Safety Systems, Inc Wire, wire rope or cable assemblies for seat belt component
CN100372709C (en) * 2003-07-25 2008-03-05 关键安全体系股份有限公司 Seat belt pretensioner with energy dissipating wire cable
US20050206153A1 (en) * 2004-03-22 2005-09-22 John Bell Seat belt pretensioner
US7219929B2 (en) 2004-03-22 2007-05-22 Key Safety Systems, Inc. Seat belt pretensioner
US7820014B2 (en) 2004-04-22 2010-10-26 Lah Ruben F Systems and methods for remotely determining and changing cutting modes during decoking
US7131667B2 (en) 2004-06-11 2006-11-07 Key Safety Systems, Inc. Seat belt pretensioner
US20050275210A1 (en) * 2004-06-11 2005-12-15 Key Safety Systems, Inc. Seat belt pretensioner
US20060017276A1 (en) * 2004-06-24 2006-01-26 John Bell Seat belt pretensioner
US7147251B2 (en) 2004-06-24 2006-12-12 Key Safety Systems, Inc. Seat belt pretensioner
US7137650B2 (en) 2004-06-24 2006-11-21 Key Safety Systems, Inc. Seat belt pretensioner
US7118133B2 (en) 2004-06-24 2006-10-10 Key Safety Systems, Inc. Seat belt pretensioner
US20060076765A1 (en) * 2004-06-24 2006-04-13 John Bell Seat belt pretensioner
US20060038391A1 (en) * 2004-06-24 2006-02-23 John Bell Seat belt pretensioner
US20070013186A1 (en) * 2005-07-12 2007-01-18 Key Safety Systems, Inc. Seat belt pretensioner
US7452003B2 (en) * 2005-07-12 2008-11-18 Key Safety Systems, Inc. Seat belt pretensioner
US20090014994A1 (en) * 2005-07-12 2009-01-15 John Forster Bell Seat belt pretensioner
US20090045615A1 (en) * 2005-07-12 2009-02-19 Key Safety Systems, Inc. Seat belt pretensioner
US7540537B2 (en) * 2005-07-12 2009-06-02 Key Safety Systems, Inc. Seat belt pretensioner
US7673906B2 (en) 2005-07-12 2010-03-09 Key Safety Systems, Inc Seat belt pretensioner
US7533902B2 (en) * 2006-05-31 2009-05-19 Key Safety Systems, Inc. Seat belt pretensioner using preformed tubes
US20070278779A1 (en) * 2006-05-31 2007-12-06 Key Safety Systems, Inc. Seat Belt Pretensioner Using Preformed Tubes
US8528986B2 (en) * 2007-02-15 2013-09-10 Ts Tech Co., Ltd. Seatbelt pretensioner mechanism for vehicle seat
US20110198910A1 (en) * 2007-02-15 2011-08-18 Ts Tech., Ltd. Seatbelt pretensioner mechanism for vehicle seat
US8550499B2 (en) 2010-12-09 2013-10-08 Autoliv Asp, Inc. Pyrotechnic lap belt pretensioner with slider bar function
US10000181B2 (en) * 2016-10-13 2018-06-19 Hyundai Motor Company Pretensioner and safety belt assembly including the same
US11390244B2 (en) * 2019-12-10 2022-07-19 GM Global Technology Operations LLC Cam based seat belt pretensioner
CN113103984A (en) * 2020-01-10 2021-07-13 均胜安全系统德国有限公司 Tensioning drive for a safety belt device and device having a tensioning drive
US11628800B2 (en) 2020-01-10 2023-04-18 Joyson Safety Systems Germany Gmbh Tensioner drive for a seatbelt installation, and assembly having a tensioner drive
CN113103984B (en) * 2020-01-10 2024-07-19 均胜安全系统德国有限公司 Tension actuator for a safety belt device and device having a tension actuator
US20210253059A1 (en) * 2020-02-14 2021-08-19 Joyson Safety Systems Acquisition Llc Seat belt pretensioner system
US11904796B2 (en) * 2020-02-14 2024-02-20 Joyson Safety Systems Acquisition Llc Seat belt pretensioner system

Also Published As

Publication number Publication date
EP0842069A1 (en) 1998-05-20
JPH11512045A (en) 1999-10-19
GB9616782D0 (en) 1996-09-25
DE69613127D1 (en) 2001-07-05
ES2158337T3 (en) 2001-09-01
GB2304027B (en) 2000-02-23
WO1997006995A1 (en) 1997-02-27
EP0842069B1 (en) 2001-05-30
GB9516540D0 (en) 1995-10-11
DE69613127T2 (en) 2001-10-25
GB2304027A (en) 1997-03-12

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